accessory cell

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Related to accessory cells: Antigen presenting cells

accessory cell

[ak′ses·ə·rē ‚sel]
(botany)
A morphologically distinct epidermal cell adjacent to, and apparently functionally associated with, guard cells on the leaves of many plants.
(immunology)
Any nonlymphocytic cell that helps in the induction of the immune response by presenting antigen to a helper T lymphocyte.
References in periodicals archive ?
Forewing with two accessory cells, while vein [R.sub.2] anastomoses with [R.sub.1] and then with [R.sub.3-5] in a point of origin of R5; [M.sub.1] from accessory cell, i.e.
(2) All of these neoplasms are derived from phagocytes or accessory cells that have benign counterparts with major roles in processing and presenting antigens to lymphocytes.
(13) T-cells in these patients usually respond to nonspecific mitogens and other non-candida antigens suggesting that the defect probably involves the accessory cells. It is possible therefore that macrophages or dendritic cells may have defective candida antigen-presenting ability or may have defective cytokine production.